Hyaluronic acid-collagen matrices for dermal filling and volumizing applications

Abstract

Hydrogels comprising a macromolecular matrix and water may be used for aesthetic fillers, for example, dermal fillers. The macromolecular matrix may include a crosslinked combination of hyaluronic acid and collagen.

What is claimed is: 
     
       1. A method of generating adipose tissue in a soft tissue of a human subject, the method comprising:
 contacting a hydrogel composition with adipose tissue ex vivo to provide a hydrogel/adipose tissue mixture; and 
 subcutaneously injecting the mixture into the soft tissue of the subject; 
 
       wherein the hydrogel composition comprises:
 (i) water; and 
 (ii) a hyaluronic acid crosslinked with a collagen via a plurality of crosslink units, wherein at least a portion of the crosslink units comprise an amide bond; and wherein 
 the hyaluronic acid concentration is from 6 mg/mL to 20 mg/mL; 
 the collagen concentration is from 3 mg/mL to 12 mg/mL; 
 the hyaluronic acid:collagen weight ratio is from 1:1 to 7:1; and 
 the hydrogel has a storage modulus value of between 850 Pa and 5,000 Pa; 
 
       thereby generating an additional amount of the adipose tissue in the soft tissue of the subject. 
     
     
       2. The method of  claim 1 , wherein the collagen comprises collagen type I, collagen type III, or a combination thereof. 
     
     
       3. The method of  claim 1 , wherein the collagen is collagen type I. 
     
     
       4. The method of  claim 2  or  3 , wherein the collagen is derived from a human or porcine source. 
     
     
       5. The method of  claim 1 , wherein the hyaluronic acid has a molecular weight of about 1,000,000 Da to about 5,000,000 Da. 
     
     
       6. The method of  claim 1 , wherein the hyaluronic acid has a molecular weight of about 1,000,000 Da to about 3,000,000 Da. 
     
     
       7. The method of  claim 1 , wherein the ratio of the hyaluronic acid to the collagen is 1:1 to 2:1. 
     
     
       8. The method of  claim 1 , wherein the ratio of the hyaluronic acid to the collagen is 1:1. 
     
     
       9. The method of  claim 1 , wherein the hydrogel has a storage modulus value of between 1,000 Pa and 5,000 Pa. 
     
     
       10. The method of  claim 1 , wherein the hydrogel has a hyaluronic acid concentration of 12 mg/mL or 16 mg/mL. 
     
     
       11. The method of  claim 1 , wherein the hydrogel has a collagen concentration of 6 mg/mL, 8 mg/mL or 12 mg/mL. 
     
     
       12. The method of  claim 1 , wherein the hydrogel has a hyaluronic acid concentration of 12 mg/mL and a collagen concentration of 6 mg/m L. 
     
     
       13. The method of  claim 1 , wherein the hydrogel has a hyaluronic acid concentration of 12 mg/mL and a collagen concentration of 12 mg/mL. 
     
     
       14. The method of  claim 1 , wherein the hydrogel has a hyaluronic acid concentration of 16 mg/mL and a collagen concentration of 8 mg/m L.